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Did you know?
The average human gut is home to perhaps 500 to 1,000 different species of bacteria.
Did you know?
The human body produces and destroys 15 million blood cells every second.
Did you know?
Intradermal injections are somewhat difficult to correctly administer because the skin layers are so thin that it is easy to accidentally punch through to the deeper subcutaneous layer.
Did you know?
The longest a person has survived after a heart transplant is 24 years.
Did you know?
Vaccines prevent between 2.5 and 4 million deaths every year.